compedgemarine

FWIW I will not use any comp cams lifters after the several sets that had issues. the isky with the bushings, jesel has bushing ones as well, supposedly will start to squeak when they start to have a problem but as said they will not fill the oil with roller bits and as said can be rebuilt. really the cost to step up to the better lifters is nothing compared to the total cost of an engine.

articfriends

Lifter issues (IF thats even what you got going on) have became a real big deal in past 10-15 years. Heres my experience/opinion on it: I used Morel lifters (hyd rollers) when they became a "thing" back in 05/06, running 180/195 seat and close to 500 lbs open up to 6300 in my own blower engine WITH 20/W 50 oil. Never had a tick or issue. Retired them at every refresh interval at about 100 hours. Also used them in quite a few customers builds with no issues regardless of oil weight. Fast forward, no matter what lies CHRIS S####B, JOHN C#####S perpetuate, around 2014 they changed something. They sped up production, sent lifter bodies to Mexico or China, IDK BUT they started having failures , plungers failing/sticking. tie bars breaking, roller wheels disintegrating. CHRIS SXXXXB in conversation on FB made THIS statement: They ONLY have 1 pair of lifters out of a 1000 sets that fail, thats funny because I flow/clean injectors for several other engine builder/dyno guys in this business and EVERY SINGLE ONE OF THEM HAS HAD FAILURES and will never buy Morels again. The comps are a step below, seen guys have failures on street engines before 5000 miles with them.
As far as hyd flat tappets, the ONLY engines I build with them anymore are class rule engines that dictate you run them (which is rare for me), and I wont warranty them in any way, shape or form. I put it in writing that any failure is customers problem and make them sign it as cam core/lifter construction has went right in the trash..Ive used johnson lifters successfully in last 40 or 50 mild bbcs ive built with no isuues.
I had one customer who i used the Morels with from that 2014/2015 era, in 2019/2020 Bob M who had sold them to me asked if customer had any issues with them. I said NO except they were noisy cold. He highly recommended changing them before they failed. I mentioned this to the customer who said nah, Im selling boat soon anyways, not worried about it. a couple rides later one failed and destroyed his cam, lifter bore etc and trashed his whole engine. Was around 150 hours IF I remember correctly

Wildman_grafix

Articfreinds,

How much HP and cam specs on the motor that you change them every 100 hours?

Not unusual to put that many or more on per year here. It's really BS that in 2023 BBC lifters could not last hundreds of hours, not like this is new tech.

Have you ever tried the ISKY ones SARIS mentioned?

No wonder people go OB.

TomZ

For Gen VI engines, what about factory GM? Their performance lifter is a tall body, p/n 17120060, and supports the camshaft in the 572/620hp (.623 lift - 254/264 @ 050). I would imagine that it would be more than capable for most of what people here would use. I haven't heard too many people complaining about them either.

This would be useful for those that have factory roller blocks. I was going to go that route but ended up with a nice set of Crane lifters.

getrdunn

Just a note with my success with jones cams and lifters. I had mike spec me out a couple SR inverse radius cams and his in-house or nearby lifters and couldn’t be happier. Easy on the valvetrain and cams are spot on for my 565 NA builds.

255/259-724/724. Pushed my heavy 12m straight bottom 87 gps (best to date) Gotta give Valako a big thumbs up also on the heads!!! Great combo for me anyway.

PQ290Enticer

Mine are gen 5.

TomZ

Yeah, I started to follow the lifter part of the thread.

Did you have a chance to locate the rocker that's giving you noise?

PQ290Enticer

Not yet and if the only way to check it is to reassemble the engine without the valve cover to get it running and look around then to be honest, I'm not looking forward to that. Especially if it turns out all the lifters were fine and I actually just had an exhaust leak.

Rookie

I've run solid Isky Red Zones on HR cams since 2006 with no issues. Isky lifters are rebuildable and I sent them back for rebuild 2yrs ago.
I have Comp HR lifters in my Merc 420's with 500 EFI cams. I bought them from the Swap Shop used, later to read later that the member had issues with them ticking in his engines. The lifters ticked on initial install, but I quieted them down by increasing lash a little not tightening the rocker nut. I run Comp 933 springs on both applications.

F-2 Speedy

PQ, to me the sound difference between a lifter tick and exhaust leak is distinct.........Id pull the covers relash all the valves reassemble and fire it up